Introduce background.scripts feature for extension manifests.

chrome/common/extensions/manifest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/extensions/manifest.h"
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/string_split.h"
@@ skipping 50 matching lines @@
     map[keys::kConvertedFromUserScript] = all_but_themes;
     map[keys::kNaClModules] = all_but_themes;
     map[keys::kWebAccessibleResources] = all_but_themes;
 
     // Everything except themes and platform apps.
     map[keys::kPlugins] = all_but_themes - Manifest::kTypePlatformApp;
 
     // Extensions and packaged apps.
     int ext_and_packaged =
         Manifest::kTypeExtension | Manifest::kTypePackagedApp;
+    map[keys::kBackgroundScripts] = ext_and_packaged;
     map[keys::kContentScripts] = ext_and_packaged;
     map[keys::kOmnibox] = ext_and_packaged;
     map[keys::kDevToolsPage] = ext_and_packaged;
     map[keys::kSidebar] = ext_and_packaged;
     map[keys::kHomepageURL] = ext_and_packaged;
     map[keys::kChromeURLOverrides] = ext_and_packaged;
     map[keys::kInputComponents] = ext_and_packaged;
     map[keys::kTtsEngine] = ext_and_packaged;
     map[keys::kFileBrowserHandlers] = ext_and_packaged;
 
@@ skipping 143 matching lines @@
 
 bool Manifest::CanAccessPath(const std::string& path) const {
   std::vector<std::string> components;
   base::SplitString(path, '.', &components);
 
   Restrictions restrictions = g_restrictions.Get();
   return restrictions.CanAccessKey(components[0], GetType());
 }
 
 }  // namespace extensions